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Java Collections lastIndexOfSubList() Method with Examples

Last Updated : 28 Dec, 2021

The lastIndexOfSubList() method of Java Collections is used in ArrayList Collection. An ArrayList is a data structure that can sequentially store data with multiple data types.

We can create an array list by using the syntax:

List<datatype> data = new ArrayList<>();

where,

  • datatype specifies the type of elements that are stored in the list
  • data is the name of an array list

The lastIndexOfSubList() method is used to get the starting position of the last occurrence of the specified target list within the specified source list.

Syntax:

public static int lastIndexOfSubList(List<?> first, List<?> last)

where,

  • first is the source list, which we search for the last occurrence of the last list
  • last is the target list, which we search for as a subList of the first list

Return Type: It will return the starting position of the last occurrence of the specified target list within the specified source list. It will return -1 if there are no occurrences in the given list.

Example 1:

Java program  to check source list in the last list


Output
2

Example 2:


Output
-1
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